Pipe wiper system

Details Pipe wiper system Pipe wiper system

1995-03-20

1998-12-01

Spisich, Mark

Brushing, scrubbing, and general cleaning

Attachments

Moving surface scraper, wiper, or brush

1510404, 152566, 166 841, 175 84, E21B 3308

Patent

active

058422528

ABSTRACT:
A pipe wiper assembly for stripping fluid from oil and gas well strings which has a pair of rams which can move from a first remote position relative to the pipe forward to a second position contacting and wiping the pipe and forward to a third position when the pipe is not in the oil or gas well to protectively cover the well, the rams being mounted in a carrier which has freedom of movement in any radial direction to allow the rams to be centralized around the oil or gas well string. The unit having alignment guides such that when the rams are returned to the first position the rams and carrier will be centralized over the well bore and the freedom of radial movement is eliminated.

REFERENCES:
patent: 1641921 (1927-09-01), Crowell
patent: 2026036 (1935-12-01), Head
patent: 2113529 (1938-04-01), Hild
patent: 2480371 (1949-08-01), Kalhoefer
patent: 2718021 (1955-09-01), Baebel
patent: 2809012 (1957-10-01), Stevens
patent: 3733641 (1973-05-01), Brown
patent: 4457366 (1984-07-01), Brown
patent: 4690213 (1987-09-01), Stannard et al.
patent: 4982787 (1991-01-01), Reddoch

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